<template>
    <div>
        <input 
        type="checkbox"
        @change="$emit('balabala', $event.target.checked)"
        :checked="aaa"
       />
    </div>
</template>
<script>
export default {
    props: ['aaa'],
    model: {
    prop: 'aaa',
    event: 'balabala'
    },
}
</script>